Envelope



v A ril 23, 1946; \F. E. CARROLL I 9 a ENVELOPE Filed Sept: 4, 1943 I I I I I v1 I I UNITED STATES j PATENT TOFFICE 3,399,006? 1 ENVELOPE I I Francis E. Carroll, Worcester, Mass, assignor to United States Envelope Company, Springfield, Mass., a corporation of Maine i j Application September 4, 194s,"serie1;1 \ie.'5o1,2'5s I 6Claims. (o1. ra -14o) The present invention relates to envelopes used as containers for those finely .poWderedmatrials, such as disinfectants, insecticides, and the like, which need, for best results, to be thoroughly and uniformly distributed, as by dusting or blowing the same onto the areas to be treated.

My invention contemplates an envelope or bag ing integral flap extensions or tabs readily seiza-' ble on opposite sides of the envelope body, to enable a bellows action to be imparted. Other and further objects and advantages of the invention will more fully appear from the following detailed description thereof, taken in connection with the accompanying drawing, in which- Fig. 1 is a plan view of the blankiromwhich the envelope of my invention is constructed.

Fig. 2; shows the initial folding of said blank, in the act of forming the envelope pocket.

Fig. 3 shows the second part of this initial folding operation.

Fig. 4 is a plan view of the completed envelope, with one end left open for the introduction of-the' contents thereof.

Fig. 5 is a view similar to Fig. 4 of the reverse side of the envelope, and showing the flap at its filling end in closed position, and

Fig. 6 is a perspective view, illustrating the bellows action of said envelope,in the dusting discharge of its contents.

Like reference characters refer to like parts 'in the different figures.

The envelope of my invention is preferably made 'from strong durable paper stock, such as manila, kraft, or the like, which is cut to provide blanks of substantially the shape and configuration shown by Fig, 1. Each such blank, as shown in Fig. 1, comprises a generally rectan gular body portion I, as outlined laterally by the broken lines 2, 3, and at one endby the broken line and at the other end by an edge 5 the latter preferably being cut away or recessed, as

below its line of juncture II .with'flap portion 9,,

is formed with arrow of apertures I2; I21through shown at 6, for a purpose to be hereinafter dewhich, in the completed envelope, the latters powdered contents are adapted to be forcibly-expelledfor blownbyia bellows action, as hereinafterdescribed.

.The other side flap a for most of its length is considerably narrower than the bodyv portion I.

and the side flap. 1. Only near one end (the and adjacent to edge 501' the body .portion I) does the flap .8 need .to lie-substantially coextensive in' width with said body portion-this increased width being for'the purpose of giving said flap 8 beyond said edge S an extension I3, much shorter than the extension I0 of the other side flap I, and serving, as hereinafter described, as a releasable closure for the discharge .openings I 2, I2. -The flap 8 about midway, of its length is formedwith a laterally extending tab I4. Also projecting from thelbody portion I is an end flap I5 of substantially conventional form, to serve as a final sealingfc'losure ior'thepocket of the completed envelopeiafter the latter has received its contents. f

With glue or other, adhesive applied, as shown by the stipp'lingtdthe side flap 8, the latters. ex.- terisioiiliifand to thel'extension II) .of the side flap I, theffir'st operation in'the manufacture of my improved envelope is to fold over the side flap 7 along the linef3 onto'the body portion. I, as shown in Fig. 2'; the second operation is to fold over the side flap18 along line 2 (see Fig. 3), and then'adhesively uniting the flaps I and. 8 over the entire area of their overlap, exceptfor the unglued tab portion I4 of said flap B. Said folding down of flap 8 also effects an adhesive union of limitedarea between the flap/extensions I0 and I3, this resulting from the spot or area I6 of moist gluelon extension I3 whichis contacted with the unglued side of the extension ID in the overlapped relation of these parts shown by F g. with the edge 'of flap' I 3'l eft free as apulltab I8.

The next operation in the manufacture of the envelope of my invention is a transverse folding operation, substantially along the line I I, to close one end offthe' fiat tube (Fig. 3) that has been formed bytheoverlapping; as above described, of side fiaps I and 8. This transverse folding onllne II thus involves the two overlapped flap extensions I0 and I 3, and occurs in a direction away from-the envelopes side or wall, Fig. 3,'that is.

formed 'by'the overlapped flaps "I and 8. That is to sayjt he folding on line II is in such a direction as to carry the flap extensions I0 and I3 down against the unseamed envelope side or wall formedby. the rectangular body portion I, thus disposing said extensionslu and I3 (see Figs. i

normally gl-i esniat against'an approximately cenej :1

tral portionso'f th unseamed envelope walllin substantially opposite relation to the ungummed tab portion l4, normally lying flat against the 1 other or seamed wall of the envelope.

Such folding over and gluing down of the extension Hl obtains the closure of, the envelope pocket at its lower end, notwithstanding the presence at said end of the openings l2, l2 com municating with the pocket interior; the reason for this being the fact that these openings are covered and rendered inefiective by the flapextensions t3, thelatter being folded over with extension fl! and being adhesively connected by the limited gluearea lfiwith the exp'osed'or outside face of "extension'lll." By this folding and sticking down of the flap extensions 10' and I3, theenvelope of my invention is completed-it being understood thattheother endof the envelope" is left open for the introduction of the powdered material which subsequently, in the use of the. 'envelope,is to be discharged through the openings l2, I2. After the desired amount of such powdered material has been introduced into the envelope pocketthrough its open end the flap l5 isfolded 'over and permanently adhered by its" glue to the seamed envelope wall-'- the linefili, *oif 'suchfoldydefin'ed, if desired, by transverse scoring of the envelope walls, being preferably positioned to include the upper edges of said walls, thereby to make the closed package (Fig. 5) leak-proof ,at its' upper corners. v

t'lwill be noted that the gumined area [6 of extension l3 does not extend to the latter's edge, said edge being left free and ungummed, to constitutje pull: tab I8 by which the flap or extensionld may be seized and pulled away, to break its limited fadhesion with the underlying outside surface of the permanently-glued-down onextehs'ion-l3fexposes and renders operative theopenings l 2;T2 through whichjthe powdered contents of the, envelope are to-be discharged. invention thus provides an envelope which; after the'flap l-S has been lifted to expo's'e'the dischar'ge openings l2, [2, can be seized, in the} mannersliown in Fig. 6, by the two tabs oriins' l4 and l'l'of its sides or walls, to give by repeatedfl'exures a bellows action to saidwalls towardfand from each other, thus to forcibly blow the. powdered contents through the discharge openings l2 ,.|2 for a thorough and uniform dustinbfftheafeas or surfaces toward which; the openings are pointed- I claim: I 5

1'. An envelope for containing and dispensin oritab, for seizure by the user toimpart flexure and a bellows action to saitlside walls,.forthe.

forcible discharge of the envelope's contents through said perforations, upon exposure of the latter by the lifting or release of said flap extension.

2. An envelope for containing and dispensing powdered material, made from a blank having a substantially rectangular body portion forming one wall of the envelope, said blank having a pairof opposite side flaps 'adaptedto be'folded over into overlapping adhesive engagement to form the other wall of said envelope, a top flap adapated to be folded transversely and adhesively secured to said folded side flaps, a bottom flap adapted to be folded transversely and adhesively secured to the first-named wall to provide the envelopes bottomv closure, the bottom closure having a stuck-down tab at one end of one of said side flaps, said bottom closure having perforations normally covered and rendered ineffective by said stuck-down tab which has a commonline of fold with said bottom flap, a free unstuck tab midway onthe side flap which has said stuck down tab, and a second free unstuck tab provided, by said bottom flap on the opposite wall of-the envelope, said two unstuck tabs serving for seizure by the user to impart fiexure and a bellows action to said walls of the envelope, for the forcible discharge of the envelopes contents through said perforations, upon exposure of same by lifting or release of said stuck-down tab.

3, As a new article of manufacture, a bellowsaction envelope made from a one-piece blank having a substantially rectangular body portion forming one wall of the envelope, and having a pair of opposite side flaps adapted to be folded over. into overlapping. adhesive engagement to formthe other wall of the envelope, said blank having a pair of transversely foldable end flaps forming the. top and bottom closures of the envelope there. being a discharge near one of said folds, one of said end flaps extending from a side flap andadhesively connected beyond its fold with the first-named envelope wall, and having at its end, substantially centrally of said wall, an unstucktab, and the other side flap providing,'on the opposite envelope wall, a second unstuck tab, said two unstuck tabs serving forseizure by the user to impart flexure and a bellowsaction to the walls of the envelope, for forcible discharge of its contents.

(i. As a new article of manufacture, a bellowsaction envelope made from a one-piece blank having a substantially rectangular body portion forming one wall of the envelope, and having a pair of opposite folded-over side flaps adapted who joined adhesively at their overlapping edges to form the seam of the other Wall of the envelope, said blank having a pair of opposite transversely foldable end. flaps forming the top and bottom closures of the envelope, one of said end, flaps. extending from a side flap andbeing secured adhesively beyond its fold to the. firstnamed envelope wall, with its extremity left free and unstuck, to form a tab substantially centrally of said wall, and a second free unstuck tab provided by one of said side flaps on the opposite envelope. wall substantially centrally of said seam,.said two tabs serving for seizure by the user. to impart flexure and a bellows action of said walls of the envelopefor the forcible discharge. of. its contents through an opening in the envelope material.

5.. ,An envelope for containing and dispensing. powdered-material, said envelope being a. one-. piece structure having a body portion to provide one wall, side portions each having a fold connection with the body portion and secured to each other in overlapped relation to provide the other envelope wall, a closure having a fold connection with one wall at one end thereof and adapted to be adhesively secured to the other wall, a second closure comprising two parts having fold connections with the side portions and being adhesively secured to each other and to the body portion, one of said parts having openings therein and a tab, the other part being adapted to cover said openings, and a tab extending from one of the side portions whereby when the openings are uncovered the tabs may be manipulated to produce fiexure of said walls for the forcible discharge of the envelopes contents through said openings.

6. As a new article of manufacture, an enhaving a fold connection with one of said walls ture having a body portion to provide one envelope wall, side portions each having a fold connection with the body portion and adhesively secured to each other in overlapped relation to provide the other envelope wall, an end closure and adapted to be adhesively secured to the other wall, and an opposite end closure having a fold connection with one of said side portions and adhesively secured to the first mentioned wall, one of said side portions and said secondmentioned end closure providing integral extensions, free of adhesive connection to the respective associated walls, said extensions providing tabs on the opposite walls for seizure by the user to produce fleXure and a bellows action of said walls for the forcible discharge of the envelopes contents when an opening is provided in the envelope material.

FRANCIS E. CARROLL. 

